guest@pc1:/boot$ grep -i 'high' config-2.6.16-2-k7
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_HIGHMEM=y
# CONFIG_HIGHPTE is not set
# Parallel IDE high-level drivers
# CONFIG_DEBUG_HIGHMEM is not set
guest@pc1:/boot$